How do I upgrade Python 2 to Python 3 Ubuntu?

So lets start:

1. Step 0: Check the current python version. Run below command to test the current version installed of python. …
2. Step 1: Install python3.7. Install python by typing: …
3. Step 2: Add python 3.6 & python 3.7 to update-alternatives. …
4. Step 3: Update python 3 to point to python 3.7. …
5. Step 4: Test the new version of python3.

How do I update Python 2 to Python 3?

Here’s what you should do, step by step:

1. Add a new “six” dependency to your application dependencies.
2. Run “pip install modernize.”
3. Run “python-modernize -w” in your project directory.
4. Review the changes. …
5. Test your app on Python 2.